        /* 通用样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* 登录注册页面 */
        .auth-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
        }

        .hidden {
            display: none;
        }

        .auth-form {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
            width: 400px;
        }

        .tabs {
            display: flex;
            margin-bottom: 1.5rem;
        }

        .tab {
            flex: 1;
            padding: 1rem;
            text-align: center;
            cursor: pointer;
            background: #eee;
        }

        .tab.active {
            background: #fff;
            font-weight: bold;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        input {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            margin-top: 0.5rem;
        }

        button {
            width: 100%;
            padding: 1rem;
            background: #1e3c72;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

        .sms-code {
            display: flex;
            gap: 1rem;
        }

        .sms-code button {
            width: 120px;
            flex-shrink: 0;
        }